code: def compile(self, ttFont):
      dataList = [
          struct.pack(">LLL", self.version, self.flags, len(self.tags))
      ]
      stringPool = ""
      for tag in self.tags:
          offset = stringPool.find(tag)
          if offset < 0:
              offset = len(stringPool)
              stringPool = stringPool + tag
          offset = offset + 12 + len(self.tags) * 4
          dataList.append(struct.pack(">HH", offset, len(tag)))
      dataList.append(tobytes(stringPool))
      return bytesjoin(dataList)
  
file_path: catboost/contrib/python/fonttools/fontTools/ttLib/tables/_l_t_a_g.py
imports: from fontTools.misc.textTools import bytesjoin, tobytes, safeEval
  from .None import DefaultTable
  import struct
label_desc: Use image node_id 4 for calling the table__l_t_a_g obj's underlying member method code with example usage: obj.compile(ttFont) and returns: bytesjoin